/* ==========================================================================
   02-CSS Repository Hub — Production Stylesheet
   Full Responsive Layout for Mobile, Tablet, Min-PC & Desktop
   ========================================================================== */

:root {
    --bg-page: #090d16;
    --bg-surface: #0f1624;
    --bg-card: #141c2e;
    --bg-card-hover: #1a253c;
    --bg-elevated: #1f2c47;
    --bg-code: #060911;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --primary: #38bdf8;
    --primary-glow: rgba(56, 189, 248, 0.25);
    --indigo: #818cf8;
    --emerald: #10b981;
    --emerald-glow: rgba(16, 185, 129, 0.25);
    --amber: #f59e0b;
    --rose: #f43f5e;

    --border-subtle: rgba(148, 163, 184, 0.12);
    --border-medium: rgba(148, 163, 184, 0.22);
    --border-focus: rgba(56, 189, 248, 0.5);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;

    --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", monospace;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.65);

    --transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1220px;
    margin: 0 auto;
    padding: 0 1.25rem;
    min-width: 0;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(9, 13, 22, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.header-container {
    width: 100%;
    max-width: 1220px;
    margin: 0 auto;
    padding: 0 1.25rem;
    height: 4.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.05rem;
}

.brand-badge {
    background: linear-gradient(135deg, var(--primary), var(--indigo));
    color: #050811;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 800;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
}

.brand-text {
    color: var(--text-primary);
}

.brand-muted {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.88rem;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.mobile-nav-toggle {
    display: none;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.15rem;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.mobile-nav-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.mobile-nav-header,
.mobile-nav-actions {
    display: none;
}

.nav-backdrop {
    display: none;
}

/* ==========================================================================
   Buttons & Tags
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-sm {
    font-size: 0.82rem;
    padding: 0.42rem 0.8rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--indigo));
    color: #050811;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--primary-glow);
}

.btn-secondary {
    background-color: var(--bg-card);
    border: 1px solid var(--border-medium);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--primary);
}

.btn-emerald {
    background-color: var(--emerald);
    color: #042617;
}

.btn-emerald:hover {
    background-color: #34d399;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--emerald-glow);
}

.btn-outline {
    background-color: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: var(--primary);
}

.btn-outline:hover {
    background-color: rgba(56, 189, 248, 0.16);
    border-color: var(--primary);
}

.btn-ghost {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
    padding: 3.5rem 0 2.5rem;
    background:
        radial-gradient(circle at 10% 10%, rgba(56, 189, 248, 0.12), transparent 45%),
        radial-gradient(circle at 90% 20%, rgba(129, 140, 248, 0.08), transparent 45%);
    border-bottom: 1px solid var(--border-subtle);
}

.hero-content {
    max-width: 820px;
    margin-bottom: 2.25rem;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.85rem;
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1.15rem;
}

.status-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background-color: var(--emerald);
    box-shadow: 0 0 8px var(--emerald);
}

.hero-title {
    font-size: clamp(1.85rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.18;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 20%, var(--indigo) 80%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1.75rem;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.metric-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.15rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

.metric-icon {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--radius-sm);
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.metric-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.15;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Section Layouts
   ========================================================================== */

.content-section {
    padding: 3.75rem 0;
    border-bottom: 1px solid var(--border-subtle);
    min-width: 0;
}

.section-dimmed {
    background-color: var(--bg-surface);
}

.section-title-wrap {
    margin-bottom: 2rem;
    min-width: 0;
}

.section-kicker {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    background-color: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.25);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.6rem;
}

.section-heading {
    font-size: clamp(1.45rem, 2.5vw, 2rem);
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.section-subtext {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 680px;
}

/* ==========================================================================
   Projects Grid
   ========================================================================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
    min-width: 0;
}

.project-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), border-color var(--transition);
    min-width: 0;
}

.project-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-focus);
}

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.85rem;
}

.project-identity {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.project-id-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    background-color: var(--bg-page);
    border: 1px solid var(--border-subtle);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.project-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.project-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: block;
}

.theme-pill {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    flex-shrink: 0;
}

.pill-cafe {
    background-color: rgba(217, 154, 78, 0.15);
    color: #eab308;
    border: 1px solid rgba(217, 154, 78, 0.35);
}

.pill-ben10 {
    background-color: rgba(132, 204, 22, 0.15);
    color: #a3e635;
    border: 1px solid rgba(132, 204, 22, 0.35);
}

.pill-campus {
    background-color: rgba(168, 85, 247, 0.15);
    color: #c084fc;
    border: 1px solid rgba(168, 85, 247, 0.35);
}

.pill-spotify {
    background-color: rgba(29, 185, 84, 0.15);
    color: #4ade80;
    border: 1px solid rgba(29, 185, 84, 0.35);
}

.project-overview {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
    margin-bottom: 1.15rem;
}

.project-specs {
    margin-bottom: 1.25rem;
    padding: 0.85rem 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.spec-block .spec-label {
    display: block;
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.spec-list {
    padding-left: 1.1rem;
    list-style: disc;
    font-size: 0.84rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background-color: var(--bg-page);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-sm);
}

.project-card-actions {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ==========================================================================
   Tables & Controlled Horizontal Scroll
   ========================================================================== */

.table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.table-header {
    padding: 0.85rem 1.15rem;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.table-header-title {
    font-size: 0.92rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.table-header-sub {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.table-scroll {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    display: block;
}

.matrix-table {
    width: 100%;
    min-width: 540px;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.matrix-table th,
.matrix-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.matrix-table th {
    background-color: rgba(9, 13, 22, 0.4);
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.matrix-table tbody tr:last-child td {
    border-bottom: none;
}

.code-pill {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--primary);
    background-color: rgba(56, 189, 248, 0.12);
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

/* Filter Toolbar */
.filter-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    min-width: 0;
}

.filter-chips-scroll {
    display: flex;
    gap: 0.4rem;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: 100%;
}

.filter-chips-scroll::-webkit-scrollbar {
    display: none;
}

.chip {
    padding: 0.4rem 0.85rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition);
}

.chip:hover {
    color: var(--text-primary);
    border-color: var(--primary);
}

.chip.active {
    background-color: var(--primary);
    color: #050811;
    border-color: var(--primary);
}

.search-input-box {
    position: relative;
    min-width: 240px;
    flex: 1;
    max-width: 340px;
}

.search-input-box i {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.82rem;
}

.search-input-box input {
    width: 100%;
    padding: 0.5rem 0.8rem 0.5rem 2.2rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.84rem;
    outline: none;
    transition: border-color var(--transition);
}

.search-input-box input:focus {
    border-color: var(--primary);
}

.results-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-bottom: 1.15rem;
}

.practices-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    min-width: 0;
}

.practice-card-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.15rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), border-color var(--transition);
    min-width: 0;
}

.practice-card-item:hover {
    transform: translateY(-2px);
    border-color: var(--border-focus);
}

.practice-top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.55rem;
}

.q-label {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    font-weight: 800;
    color: var(--primary);
    background-color: rgba(56, 189, 248, 0.12);
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-sm);
}

.q-cat {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.practice-card-item h4 {
    font-size: 0.94rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.35rem;
}

.practice-card-item p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.practice-actions-row {
    margin-top: auto;
    display: flex;
    gap: 0.4rem;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border-subtle);
}

.empty-results-box {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2.5rem 1.25rem;
    background-color: var(--bg-card);
    border: 1px dashed var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

/* ==========================================================================
   Notes Feature & Structure Grids
   ========================================================================== */

.notes-feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 1.75rem;
    align-items: center;
    box-shadow: var(--shadow-md);
    min-width: 0;
}

.notes-feature-heading {
    font-size: clamp(1.35rem, 2.2vw, 1.75rem);
    font-weight: 700;
    margin-bottom: 0.65rem;
}

.notes-feature-text {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.35rem;
}

.notes-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.pdf-document-card {
    background: linear-gradient(145deg, #182236 0%, #0d1424 100%);
    border: 1px solid rgba(16, 185, 129, 0.35);
    border-radius: var(--radius-md);
    padding: 1.35rem;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    min-width: 0;
}

.pdf-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 800;
    color: #34d399;
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    width: fit-content;
}

.pdf-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.pdf-card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.pdf-card-topics {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.4rem 0;
}

.pdf-card-topics li {
    font-size: 0.78rem;
    color: #cbd5e1;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.pdf-card-topics li i {
    color: var(--emerald);
    font-size: 0.72rem;
}

.pdf-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.65rem;
    border-top: 1px solid var(--border-subtle);
}

.pdf-file-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
}

.pdf-quick-link {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--emerald);
}

.structure-split-grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 1.25rem;
    align-items: start;
    min-width: 0;
}

.structure-panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.15rem;
    min-width: 0;
}

.panel-top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--border-subtle);
}

.panel-title-text {
    font-size: 0.88rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.copy-tree-action {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.05);
    padding: 0.3rem 0.55rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.tree-code-block {
    background-color: var(--bg-code);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.85rem;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    line-height: 1.5;
    color: #cbd5e1;
    overflow-x: auto;
    white-space: pre;
    max-width: 100%;
}

.tech-side-panel {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    min-width: 0;
}

.tech-panel-card,
.workflow-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    min-width: 0;
}

.tech-card-heading {
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.tech-list li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.tech-icon-wrap {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.html-icon { background-color: rgba(249, 115, 22, 0.15); color: #fb923c; }
.css-icon { background-color: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.js-icon { background-color: rgba(250, 204, 21, 0.15); color: #facc15; }

.tech-list strong {
    display: block;
    font-size: 0.88rem;
}

.tech-list p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.workflow-steps {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.step-item {
    font-size: 0.82rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.step-item span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    background-color: rgba(56, 189, 248, 0.12);
    color: var(--primary);
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* ==========================================================================
   Footer & Toast
   ========================================================================== */

.site-footer {
    padding: 2rem 0;
    background-color: var(--bg-code);
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-tagline {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.roadmap-badge {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    background-color: rgba(129, 140, 248, 0.1);
    border: 1px solid rgba(129, 140, 248, 0.25);
    color: #c7d2fe;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background-color: #1e293b;
    border: 1px solid var(--border-focus);
    color: #f8fafc;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.65rem;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* ==========================================================================
   Multi-Device Responsive Breakpoints
   ========================================================================== */

/* Small PCs & Laptops (992px to 1199px) */
@media (max-width: 1199px) and (min-width: 992px) {
    .projects-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1.25rem;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .structure-split-grid,
    .notes-feature-card {
        grid-template-columns: 1fr;
    }

    .notes-feature-preview {
        max-width: 540px;
        margin: 0 auto;
    }
}

/* Tablets (769px to 991px) */
@media (max-width: 991px) and (min-width: 769px) {
    .desktop-only {
        display: inline-flex !important;
    }

    .projects-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
    }

    .metrics-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .structure-split-grid,
    .notes-feature-card {
        grid-template-columns: 1fr;
    }

    .notes-feature-preview {
        max-width: 520px;
        margin: 0 auto;
    }
}

/* Mobile & Small Tablets (<= 768px) */
@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }

    .mobile-nav-toggle {
        display: inline-flex;
    }

    /* Reliable Full-Header Dropdown Panel (No Stacking Trap) */
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-surface);
        border-bottom: 1px solid var(--border-medium);
        box-shadow: var(--shadow-lg);
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 1.25rem 1rem;
        z-index: 1000;
    }

    .main-nav.open {
        display: flex;
    }

    .mobile-nav-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-bottom: 0.75rem;
        margin-bottom: 0.75rem;
        border-bottom: 1px solid var(--border-subtle);
    }

    .mobile-nav-title {
        font-weight: 700;
        font-size: 0.95rem;
    }

    .mobile-close-btn {
        width: 2rem;
        height: 2rem;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        font-size: 1.15rem;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0.4rem;
        margin-bottom: 1rem;
    }

    .nav-link {
        display: block;
        padding: 0.65rem 0.85rem;
        font-size: 0.92rem;
        border-radius: var(--radius-sm);
    }

    .nav-link:hover {
        background-color: rgba(255, 255, 255, 0.05);
    }

    .mobile-nav-actions {
        display: block;
        padding-top: 0.85rem;
        border-top: 1px solid var(--border-subtle);
    }

    .mobile-nav-actions .btn {
        width: 100%;
    }

    .projects-grid,
    .metrics-grid,
    .structure-split-grid,
    .notes-feature-card {
        grid-template-columns: 1fr;
    }

    .filter-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input-box {
        max-width: 100%;
        min-width: 100%;
    }

    .hero-cta-group .btn {
        width: 100%;
    }
}

/* Compact Mobile (<= 480px) */
@media (max-width: 480px) {
    .container,
    .header-container {
        padding: 0 0.85rem;
    }

    .hero-section {
        padding: 2.75rem 0 2rem;
    }

    .project-card {
        padding: 1.15rem;
    }

    .project-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.4rem;
    }

    .project-card-actions .btn {
        flex: 1 1 auto;
    }

    .tree-code-block {
        font-size: 0.72rem;
        padding: 0.65rem;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.85rem;
    }
}